What airlines fly to Sofia?

Lufthansa, United Airlines and Air Canada are the top three most popular airlines that fly to Sofia from St. Louis according to our data. Lufthansa is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 3 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 3 as of October 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$741 Cheap Flights from St. Louis to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Sofia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:17 pm - 1:15 pmSTL Lambert-St Louis-SOF Sofia

15h 58m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 3:26 pmSOF Sofia-STL Lambert-St Louis

41h 01m2 stops Frankfurt am Main Toronto Pearson Intl

$741United Airlines

Mon, Jan 11 - Thu, Jan 14

3:21 pm - 10:55 pmSTL Lambert-St Louis-SOF Sofia

23h 34m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$741United Airlines

Mon, Jan 11 - Thu, Jan 14

8:30 am - 1:15 pmSTL Lambert-St Louis-SOF Sofia

20h 45m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:25 am - 10:30 pmSOF Sofia-STL Lambert-St Louis

24h 05m2 stops Frankfurt am Main Houston George Bush Intcntl

$743United Airlines

Mon, Jan 11 - Thu, Jan 14

6:50 pm - 10:55 pmSTL Lambert-St Louis-SOF Sofia

20h 05m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 1:45 pmSOF Sofia-STL Lambert-St Louis

15h 20m1 stop Frankfurt am Main

$803Lufthansa

Wed, Nov 25 - Fri, Mar 12

1:08 pm - 10:55 pmSTL Lambert-St Louis-SOF Sofia

25h 47m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 1:45 pmSOF Sofia-STL Lambert-St Louis

15h 20m1 stop Frankfurt am Main

$803Lufthansa

Tue, Nov 24 - Fri, Mar 12

6:50 pm - 6:20 pmSTL Lambert-St Louis-SOF Sofia

15h 30m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 4:59 pmSOF Sofia-STL Lambert-St Louis

18h 34m2 stops Frankfurt am Main Chicago O'Hare Intl

$806Lufthansa

Sun, Nov 8 - Tue, Nov 24

5:29 pm - 8:10 pmSTL Lambert-St Louis-SOF Sofia

42h 41m2 stops Chicago O'Hare Intl London Heathrow

5:15 pm - 8:33 pmSOF Sofia-STL Lambert-St Louis

35h 18m2 stops London Heathrow Philadelphia

$810British Airways

Mon, Nov 16 - Mon, Nov 23

4:05 pm - 1:25 pmSTL Lambert-St Louis-SOF Sofia

37h 20m2 stops Toronto Pearson Intl Frankfurt am Main

6:25 am - 3:26 pmSOF Sofia-STL Lambert-St Louis

17h 01m2 stops Frankfurt am Main Toronto Pearson Intl

$833Air Canada

Sat, Nov 28 - Fri, Mar 12

4:05 pm - 1:25 pmSTL Lambert-St Louis-SOF Sofia

37h 20m2 stops Toronto Pearson Intl Frankfurt am Main

6:25 am - 3:26 pmSOF Sofia-STL Lambert-St Louis

17h 01m2 stops Frankfurt am Main Toronto Pearson Intl

$833Air Canada

Sat, Nov 28 - Wed, Mar 10

10:53 am - 1:25 pmSTL Lambert-St Louis-SOF Sofia

18h 32m3 stops Chicago O'Hare Intl Toronto Pearson Intl Frankfurt am Main

2:10 pm - 3:26 pmSOF Sofia-STL Lambert-St Louis

33h 16m2 stops Frankfurt am Main Toronto Pearson Intl

$837Multiple Airlines

Wed, Nov 25 - Fri, Mar 12

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Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets

Lufthansa

Nov 24

STL1:08 pmLambert-St Louis

25h 47m

2 stops

SOF10:55 pmSofia

Mar 12

SOF6:25 amSofia

15h 20m

1 stop

STL1:45 pmLambert-St Louis

$803

Lufthansa

Nov 8

STL6:50 pmLambert-St Louis

15h 30m

2 stops

SOF6:20 pmSofia

Nov 24

SOF6:25 amSofia

18h 34m

2 stops

STL4:59 pmLambert-St Louis

$806

Lufthansa

Nov 24

STL6:50 pmLambert-St Louis

20h 05m

2 stops

SOF10:55 pmSofia

Mar 12

SOF6:25 amSofia

22h 48m

2 stops

STL9:13 pmLambert-St Louis

$807

British Airways flights from St. Louis to Sofia

Our best British Airways deals on St. Louis to Sofia flight tickets

British Airways

Nov 16

STL5:29 pmLambert-St Louis

42h 41m

2 stops

SOF8:10 pmSofia

Nov 23

SOF5:15 pmSofia

35h 18m

2 stops

STL8:33 pmLambert-St Louis

$810

British Airways

Nov 25

STL8:12 pmLambert-St Louis

39h 08m

2 stops

SOF7:20 pmSofia

Mar 14

SOF7:45 pmSofia

32h 23m

2 stops

STL9:08 pmLambert-St Louis

$1,173

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 1/11

1:17 pm-1:15 pm

2 stops15h 58m

Sofia

Thu 1/14

6:25 am-3:26 pm

2 stops41h 01m

$741

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 1/11

3:21 pm-10:55 pm

2 stops23h 34m

Sofia

Thu 1/14

2:10 pm-3:26 pm

2 stops33h 16m

$741

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 1/11

8:30 am-1:15 pm

2 stops20h 45m

Sofia

Thu 1/14

6:25 am-10:30 pm

2 stops24h 05m

$743

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/25

6:50 pm-10:55 pm

2 stops20h 05m

Sofia

Fri 3/12

6:25 am-1:45 pm

1 stop15h 20m

$803

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Tue 11/24

1:08 pm-10:55 pm

2 stops25h 47m

Sofia

Fri 3/12

6:25 am-1:45 pm

1 stop15h 20m

$803

Quickest round-trip

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Sun 11/8

6:50 pm-6:20 pm

2 stops15h 30m

Sofia

Tue 11/24

6:25 am-4:59 pm

2 stops18h 34m

$806

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Mon 11/16

5:29 pm-8:10 pm

2 stops42h 41m

Sofia

Mon 11/23

5:15 pm-8:33 pm

2 stops35h 18m

$810

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Sat 11/28

4:05 pm-1:25 pm

2 stops37h 20m

Sofia

Fri 3/12

6:25 am-3:26 pm

2 stops17h 01m

$833

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Sat 11/28

4:05 pm-1:25 pm

2 stops37h 20m

Sofia

Wed 3/10

6:25 am-3:26 pm

2 stops17h 01m

$833

St. LouisSofia

STL Lambert-St Louis - SOF Sofia

STLSOF

Lambert-St Louis

Wed 11/25

10:53 am-1:25 pm

3 stops18h 32m

Sofia

Fri 3/12

2:10 pm-3:26 pm

2 stops33h 16m

$837

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from St. Louis is in January. Flight prices, which tend to average around $528, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Sofia from St. Louis during February instead. Flights to Sofia in February, while not as cheap as those in January, still average around $567.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 44% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Best Price Found	$741
Fastest flight time	13h 45m
Direct flights	None

The best flight deal from St. Louis to Sofia found on momondo in the last 72 hours is $741

The fastest flight from St. Louis to Sofia takes 13h 45m

There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.

Search flight deals

Frequently asked questions about flying from St. Louis to Sofia

How far is Lambert-St Louis to Sofia by plane?
A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 13h 45m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?
Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?
The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 3 as of October 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Sofia?
Based on momondo bookings for flights between St. Louis and Sofia, the leading airline is Lufthansa, making up 55% of the total bookings. Other popular airlines include United Airlines with 26% and Air Canada with 19%.

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $559	Free Cancellation	Rating 7.4 10,285 reviews	Search United Airlines flights
Lufthansa	PriceFrom $560	Free Cancellation	Rating 6.8 8,259 reviews	Search Lufthansa flights
Air Canada	PriceFrom $1,108	Free Cancellation	Rating 7.1 11,722 reviews	Search Air Canada flights

Bansko

Borovets

Velingrad

Sandanski

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Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

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Cheap flights from St. Louis to Sofia from $741

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets

British Airways flights from St. Louis to Sofia

Our best British Airways deals on St. Louis to Sofia flight tickets

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How to get the cheapest flight ticket from St. Louis to Sofia

What is the cheapest month to fly to Sofia?

Can stopping save me money on St. Louis to Sofia flights?

What airlines fly to Sofia?

When to book flights from St. Louis to Sofia

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Sofia

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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